Pütz Celina, van den Berg Berry, Lorist Monicque M
Department of Experimental Psychology, University of Groningen, Grote Kruisstraat 2/1, Groningen 9712TS, the Netherlands.
Department of Neurobiology, University of Groningen, P.O. Box 11103, Groningen 9700CC, the Netherlands.
iScience. 2022 Apr 25;25(5):104302. doi: 10.1016/j.isci.2022.104302. eCollection 2022 May 20.
Learned stimulus-reward associations can modulate behavior and the underlying neural processing of information. We investigated the cascade of these neurocognitive mechanisms involved in the learning of stimulus-reward associations. Using electroencephalogram recordings while participants performed a probabilistic spatial reward learning task, we observed that the feedback-related negativity component was more negative in response to loss feedback compared to gain feedback but showed no modulation by learning. The late positive component became larger in response to losses as the learning set progressed but smaller in response to gains. In addition, feedback-locked alpha frequency oscillations measured over occipital sites were predictive of N2pc amplitudes-a marker of spatial attention orienting-observed on the next trial. This relationship was found to become stronger with learning set progression. Taken together, we elucidated neurocognitive dynamics underlying feedback processing during spatial reward learning, and the subsequent effects of these learned spatial stimulus-reward associations on spatial attention.
习得的刺激-奖励关联能够调节行为以及潜在的信息神经处理过程。我们研究了参与刺激-奖励关联学习的这些神经认知机制的级联反应。在参与者执行概率性空间奖励学习任务时，我们使用脑电图记录，观察到与反馈相关的负性成分在对损失反馈的反应中比在对收益反馈的反应中更负，但未表现出学习的调节作用。随着学习进程的推进，晚期正性成分对损失的反应变得更大，但对收益的反应则变小。此外，在枕叶部位测量的与反馈锁定的阿尔法频率振荡可预测下一次试验中观察到的N2pc振幅（空间注意定向的一个指标）。发现这种关系随着学习进程的推进而变得更强。综上所述，我们阐明了空间奖励学习过程中反馈处理背后的神经认知动态，以及这些习得的空间刺激-奖励关联对空间注意的后续影响。
